O-ITF-07
Page
7
(D) "START-UP" SERVICE
(1)
After unit is permanently positioned, fan isolation shipping lock-down bolt, only (see drawing), should
be removed. If load points are not on same plane after supports are removed readjust isolator or shim
until elevation of load points are uniform.
(2)
Access door to piping compartment is provided if pipe chase is furnished. All plumbing in field
should be done through chase (Do Not puncture casing). Use back-up wrenches on stubouts and
swing joint piping or flex piping to avoid damage to headers and tubes. If, for any reason, it is
necessary to cut a hole in the unit casing, this hole should be cut through a side panel (not
through any access door) and then carefully sealed. If vestibule is furnished all piping should be
run inside the vestibule and plumbed through the chase hole cover plate. Access door to
vestibule or chase compartment should be closed and latched securely to avoid plumbing freeze
up.
(3)
Vault type door latches provided on access doors can be adjusted by changing position of bevelled
flange or handle on inside. Access door gasketing must not be removable or leakage of air and
water
could
result.
(4)
Check motor mounting to make sure all nuts are tight. Confirm that the motor voltage, phase,
and HP size are compatible with wiring. Motor nameplate amperage is maximum. All electrical
connections should be tight, complete and properly terminated.
(5)
Supply and return air duct flanges are provided and should be attached to ducts with flexible
connector unless fans are internally isolated. Multizone units require field zoning of individual
zone segments by use of "W" clips which attach to zone separators.
(6)
Fan blower wheels should rotate freely. Check motor and fan sheave for proper alignment and
make sure set screws are tight. Check bearing-collar set screws on fan shaft and fan hub set
screws for tightness. Loose collars and/or set screws will ruin the shaft quickly. Ball bearings
have been lubricated at the factory and do not need further attention at start-up. Do Not operate
fans with imbalance. During fan (supply and return) start-up observe the rotation and if fan is
operating backward, reverse two legs of the supply electrical power if three phase.
Larger Drawing
Located In The
Manual
